HELMET SIZING
Helmet sizing is based on head circumference. (Figure 2 shows how the
crewmember’s head is measured for circumference.) Below are sizing
parameters.
HELMET SIZE MAXIMUM HEAD CIRCUMFERENCE (INCHES)*
Small < 21.5
Regular 21.5 - 22.4
X-Large 22.4 - 23.5
XX-Large > 23.5
• These are rule-of-thumb measurements. At times, the next larger or smaller
size may be required to achieve a satisfactory fit.
Figure 2. Head Circumference for Helmet Sizing
2
TAPE MEASURE
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